| ID | Problem Show tags Hide tags | AC / Tried | Difficulty | |
|---|---|---|---|---|
| 488 | DEMC047 DE-MC-047 保留左表所有客户及其可能存在的订单,应使用? | 0 / 0 | 2 | |
| 568 | DEMC127 DE-MC-127 固定FROM门店表m,需保留所有门店,即使当月无销售。应怎样连接销售表s? | 0 / 0 | 2 |
By signing up a Hydro universal account, you can submit code and join discussions in all online judging services provided by us.